what is subsurface equipment -...
TRANSCRIPT
What Is Subsurface Equipment?
A production/injection is equipped with many surface and subsurface equipment.
The surface equipment are x-mas tree, wellhead, surface safety valve, etc.
There are many subsurface equipment installed in a tubing string in order to perform their respective functions.
Types of Subsurface Equipment
Can be categorized as follows:
Subsurface safety equipment.
Flow control equipment.
Communication equipment.
Auxiliary equipment.
Subsurface Safety Equipment
Surface control subsurface safety
valve
Safety valve landing nipple
Production packer.
Well Completion &
Safety Valve
• Safety Valves
Subsurface Safety Valve Systems
● Primary Purpose
– Emergency well flow control
device
– Prevents losses
– Personnel, environment,
reserves, image
● Secondary Purpose
– Downhole Flow Control
– Allows for wellhead problem
corrections
– Serves as a secondary barrier
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Subsurface Safety Valve Systems
● Regulations
– API 14 A, Specification for SSSVs
– API 14 B, Install, operate SSSVs
– ISO 10432, Standard for SSSV products
– ISO 10417, Installation et al for SSSVs
– MMS, Department of the Interior
– CFR 250, USA federal laws
– International standard bodies
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Subsurface Safety Valve Systems
● Types of SSSVs
– Surface Controlled
• Tubing retrievable
• Slickline retrievable
• Others, pump-in-place: coiled
tubing
– Subsurface Controlled
• Velocity
• Injection
WIRELINE RETRIEVABLE SCSSSV
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CLOSURE MECHANISM
Flow Control Equipment
Flow couplings.
Blast joint.
Selective landing nipple
No-go landing nipple
Tubing plug
Seal units
Flow Control Equipment (Cont’d)
Check valves - installed in the tubing
string to prevent the back flow of
injection well.
Bottomhole chokes/beans and
regulators - to reduce the wellhead
flowing pressure and prevent the
freezing of surface controls and lines
by taking a pressure drop downhole.
Pulling tool
Pulling tool
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Wireline Unit
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Wireline
Communication Equipment
Sliding sleeve
Side-pocket gas lift mandrel
SLIDING SLEEVE
• Shifting tool
Shifting tool
Side Pocket Gas Lift Mandrel
INJECTION GAS
PRODUCED FLUID
PRESSURE (PSI)
DE
PT
H (
FT
TV
D)
1000
2000
3000
4000
5000
6000
7000
0
1000 20000
OPERATING GAS LIFT
VALVE
CASING PRESSURE WHEN
WELL IS BEING GAS LIFTED
FBHP
SIB
HP
CONSTANT FLOW GAS LIFT WELL
KICKOVER TOOL
Components for Wireline Retrievable
Gas Lift
• Side Pocket mandrel
• Kick Over Tool
• Running Tool
• Pulling Tool
• Gas Lift Valve
• Valve Latch
Auxiliary Equipment
Double pin sub
Rigid blade tubing centralizer
Straight-slot or J-slot body
Mule/guide shoe.
Double pin sub
Seal unit
Muleshoe guide
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